18330043 has 4 divisors (see below), whose sum is σ = 18346968. Its totient is φ = 18313120.

The previous prime is 18330031. The next prime is 18330071. The reversal of 18330043 is 34003381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34003381 = 313 ⋅108637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18330043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18329996 and 18330023.

It is not an unprimeable number, because it can be changed into a prime (18331043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6718 + ... + 9043.

It is an arithmetic number, because the mean of its divisors is an integer number (4586742).

Almost surely, 2^18330043 is an apocalyptic number.

18330043 is a deficient number, since it is larger than the sum of its proper divisors (16925).

18330043 is a wasteful number, since it uses less digits than its factorization.

18330043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16924.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 18330043 is about 4281.3599474933. The cubic root of 18330043 is about 263.6662209294. Note that the first 3 decimals are identical.

The spelling of 18330043 in words is "eighteen million, three hundred thirty thousand, forty-three".